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Any software made available via TimeCenter is provided \as is " and without any express or implied warranties, including, without limitation, the implied warranty of merchantability and tness for a particular purpose. The TimeCenter icon on the cover combines two \arrows. " These \arrows " are letters in the so-called Rune alphabet used one millennium ago by the Vikings, as well as by their precedessors and successors, The Rune alphabet (second phase) has 16 letters. They all have angular shapes and lack horizontal lines because the primary storage medium was wood. However, runes may also be found on jewelry, tools, and weapons. Runes were perceived by many ashaving magic, hidden powers. The two Rune arrows in the icon denote \T " and \C, " respectively. Mobile computing has the potential for managing information globally. Data management issues in mobile computing have received some attention in recent times, and the design of adaptive broadcast protocols has been posed as an important problem. Such protocols are employed by database servers to decide on the content of broadcasts dynamically, in response to clien